Zoom optical system and imaging apparatus using the same

摘要

A zoom optical system includes only one optical-element group moved in a magnification change and at least one deformable mirror having a compensating function for compensating for a shift of an image surface caused by the magnification change and a focusing function. According to this configuration of the zoom optical system, it is possible to attain a zoom optical system and an imaging apparatus using the zoom optical system that have as small a number of movable lenses as possible, are very small in size, and work with an extremely low power consumption and low operation noise.